---
product_id: 515825542
title: "Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connector Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package,2 Years Warranty"
brand: "nilight"
price: "249 zł"
currency: PLN
in_stock: true
reviews_count: 5
category: "Nilight"
url: https://www.desertcart.pl/products/515825542-nilight-4-way-flat-to-7-way-round-blade-trailer
store_origin: PL
region: Poland
---

# 4-pin to 7-pin seamless power transfer Includes mounting bracket & hardware Rust-resistant, sealed heavy-duty build Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connector Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package,2 Years Warranty

**Brand:** nilight
**Price:** 249 zł
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with confidence—tow smarter, not harder!

## Quick Answers

- **What is this?** Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connector Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package,2 Years Warranty by nilight
- **How much does it cost?** 249 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/515825542-nilight-4-way-flat-to-7-way-round-blade-trailer)

## Best For

- nilight enthusiasts

## Why This Product

- Trusted nilight brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Pros:** Top-rated with 4.6 stars and thousands of happy users—join the elite towing community.
- • **Flawless Connectivity:** No wiggle-room, no loose fittings—ensures stable trailer power transfer every time.
- • **Universal Compatibility:** Works seamlessly with most trailers, RVs, and factory tow packages for versatile use.
- • **All-in-One Installation Kit:** Comes with mounting bracket, screws, and nuts for a hassle-free setup.
- • **Built to Brave the Elements:** Durable black plastic housing with sealed cover protects against dust, moisture, and corrosion.

## Overview

The Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter converts your vehicle’s 4-pin flat socket to a 7-pin round blade trailer plug, delivering reliable power transfer for signals, brakes, and auxiliary functions. Featuring a heavy-duty, rust-resistant design with a sealed cover and included mounting hardware, it ensures a secure, weatherproof connection ideal for RVs, trucks, and trailers. Backed by a 2-year warranty and top user ratings, it’s the professional’s choice for effortless towing upgrades.

## Description

Nilight Trailer Plug AdapterNilight 4-Way Flat to 7-Way Round Blade Trailer Adapter with Mounting Bracket for RV Truck Factory Tow Package is made to convert 4-way flat vehicle end to 7-way blade trailer end, makes the tight connection between vehicle socket and trailer plug, no wiggle-room, no loose fittings. Transfers the power from the vehicle to the trailer. Package Included: 1 x Trailer Adapter Plug, 1 x Mounting bracket 6 screws & 6 nuts, 1 x User Manual.

Review: Direct fit 2001 F250 Ten minute install in 15* temps, probably less in nicer conditions.
Review: Great quality and works great. Was very impressed with product

## Features

- Compact Traction Adapter: This adapter converts 4 way flat vehicle end to 7 way blade trailer end, makes tight connection between vehicle socket and trailer plug, no wiggle-room, no loose fittings. Transfers the power from the vehicle to trailer.
- Function: 4-pin flat socket designed to be converted to the 7-pin blade round type socket. Works on most vehicle wiring component like turn signals, brakes,reverse light and auxiliary power.
- Durable Construction: Heavy duty black plastic construction prevents rusting, enhances appearance. Well sealed spring loaded cover increases protection against dust, moisture and corrosion. Protects the inner contacts from rust or damage. The black wire loom keeps the wiring contained and protects the harness for long lasting use.
- Easy to Install: The 4 way to 7 way trailer adapter equipped with mounting bracket, screws, and nuts,conveniently connect the trailer wiring adapter to your trailer hitch or bumper and just find the right position to install and tighten the nut to install successfully.
- Wide Application: Come with 1 x Trailer Adapter Plug, 1 x Mounting bracket 6 screws & 6 nuts, 1 x User Manual. Perfect for most trailers, semitrailers, caravans, RV. Commonly used with T-connectors or tail lamp converters with 4-way flat car end connections.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BWD8F5MP |
| Best Sellers Rank | #2,598 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Hitch Wiring |
| Brand | Nilight |
| Customer Reviews | 4.6 4.6 out of 5 stars (616) |
| Date First Available | 5 March 2023 |
| Item Weight | 290 g |
| Item model number | 50303T |
| Manufacturer | Nilight |
| Manufacturer Part Number | 50303T |
| Model | 4 Way Flat to 7 Way Round Blade Trailer Adapter |
| Package Dimensions | 16 x 9.3 x 8 cm; 290 g |

## Product Details

- **Brand:** Nilight
- **Connector type:** 4-way Flat to 7-way Round Blade
- **Item weight:** 0.29 Kilograms
- **Material:** Plastic
- **Recommended uses for product:** electrical

## Images

![Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connector Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package,2 Years Warranty - Image 1](https://m.media-amazon.com/images/I/610KZWiUvsL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***N on 6 March 2026*

Direct fit 2001 F250 Ten minute install in 15* temps, probably less in nicer conditions.

### ⭐⭐⭐⭐⭐ Review
*by C***E on 3 May 2025*

Great quality and works great. Was very impressed with product

### ⭐⭐⭐⭐⭐ Review
*by M***R on 21 November 2025*

This wiring harness adapter worked great. Attached to both the trailer plug and the tow vehicle plug without difficulty. It is hard to find a 4 flat adapter with a hole for the ground and prongs for the lights which our vehicle plug took. Both ends fit just right. The adapter looks good. The harness feels like it has quality wires and appears to be made to last. I would recommend this adapter harness to anyone who is in the market for this type of connecter. Mike

## Frequently Bought Together

- Nilight 4 Way Flat to 7 Way Round Blade Trailer Adapter Wiring Harness 4 Pin to 7 Pin Electrical Connector Wiring Plug Connector with Mounting Bracket for RV Truck Factory Tow Package,2 Years Warranty
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**Shop now:** [https://www.desertcart.pl/products/515825542-nilight-4-way-flat-to-7-way-round-blade-trailer](https://www.desertcart.pl/products/515825542-nilight-4-way-flat-to-7-way-round-blade-trailer)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-20*